Xgrip

Xgrips consist of two (left & right) lock-on inserts which are mounted
on the inside of any common handlebar tube end. The inserts contain
a vibration motor and communicates tracking information via Bluetooth
from your smart phone using our downloadable mapping app.
Plot your route and put your smart phone in your pocket. At every coming
intersection the left or right plug vibrates to inform you of your turn

or to continue riding forward. The mapping system even
recalculates your route if you miss a turn. Never pull out your phone
or a map en route ever again!
Using Bluetooth Low Energy (BLE), GPS, and
application software technology in tandem with various electrical systems
communicating between cell phone and the vibration mechanisms located
inside the handlebars under the handlebar grips.